gistfile1.html

# Initial Script Call

<script type="text/javascript">
	var cache_buster = Math.floor(Math.random()*9999999);
	var zpix = document.createElement('script');
	zpix.type = 'text/javascript';
	zpix.async = true;
	zpix.src = (document.location.protocol == 'https:' ? 'https://192.168.1.90/pixel/3.js' : 'http://192.168.1.90/pixel/3.js');
	document.getElementsByTagName('body')[0].appendChild(zpix);
	</script>
	<noscript><iframe src="http://192.168.1.90/app_dev.php/pixel/3.php" width="1" height="1" style="display: none;"></iframe></noscript>

# What ^ Appends
<script type="text/javascript" async="" src="http://192.168.1.90/pixel/3.js"></script>

# What's inside ^
var pixels = "<iframe src=\"https:\/\/example-domain1.com\/pixel\/3135.php\" width=\"1\" height=\"1\" style=\"display: none;\"><\/iframe>\n<img src=\"https:\/\/example-domain3.com\/pixel\/offer-35511.gif\" width=\"1\" height=\"1\" \/>\n<iframe src=\"https:\/\/example-domain3.com\/pixel\/5511.html\" width=\"1\" height=\"1\" style=\"display: none;\"><\/iframe>";
document.write(pixels);